Miniature optical lens assembly having optical element, imaging apparatus and electronic device

ABSTRACT

A miniature optical lens assembly, which has at least one of optical element, includes the optical element. The optical element includes a low reflection layer disposed on at least one surface of the optical element. The low reflection layer includes a plurality of nanocrystalline grains, and the nanocrystalline grains are located on one surface of the low reflection layer. The optical element is at least one of a light blocking element, an annular spacer element and a barrel element.

RELATED APPLICATIONS

This application claims priority to U.S. Provisional Application Ser.No. 62/773,250, filed Nov. 30, 2018, which is herein incorporated byreference.

BACKGROUND Technical Field

The present disclosure relates to an optical lens assembly. Moreparticularly, the present disclosure relates to a miniature optical lensassembly having optical elements.

Description of Related Art

In recent years, it has become more and more popular to use a miniatureoptical lens assembly with optical elements for photographing. However,the use of the mobile device is often affected by strong sunlight in theoutdoor environment, so that the image quality of the optical lensassembly will be greatly reduced by strong non-imaging stray light.

In the prior arts, a surface of the opaque optical elements of theoptical lens assembly is treated by ink-painting method, sandblastingmethod and coating method so as to reduce the reflectance thereof andeliminate stray light. However, although the aforementioned methods canincrease the image quality of the optical lens assembly, it is still noteffective enough to eliminate high-intensity stray light. Furthermore,in the field of the optical lens assembly of the non-mobile devices,there are other techniques for reducing reflectance, for example, bycreating a film-layer surface thereon so as to create a porousmicrostructure. However, the structural support of the porousmicrostructure is insufficient, and the film-layer surface is easy todeform when an external force is applied thereon so that theanti-reflection effect will be greatly reduced.

Moreover, although most of the prior arts can achieve a betteranti-reflection effect by a multi-layer coating method, the multi-layerpreparing process is complicated, and the cost of the coating is high,making it impossible to be widely used in the optical lens industry.

SUMMARY

According to one aspect of the present disclosure, a miniature opticallens assembly, which has at least one of optical element, includes theoptical element. The optical element includes a low reflection layer.The low reflection layer is disposed on at least one surface of theoptical element, wherein the low reflection layer includes a pluralityof nanocrystalline grains located on one surface of the low reflectionlayer. The optical element is at least one of a light blocking element,an annular spacer element and a barrel element. When an average diameterof the nanocrystalline grains is DC, and a reflectance in a wavelengthrange of 380 nm-780 nm of the low reflection layer is R3878, thefollowing conditions are satisfied:

5 nm≤DC≤200 nm; and

R3878≤0.50%.

According to another aspect of the present disclosure, an imagingapparatus includes the miniature optical lens assembly according to theaforementioned aspect and an image sensor disposed on an image surfaceof the optical image lens assembly with the optical element.

According to another aspect of the present disclosure, an electronicdevice includes the imaging apparatus according to the aforementionedaspect.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure can be more fully understood by reading thefollowing detailed description of the embodiment, with reference made tothe accompanying drawings as follows:

FIG. 1 shows the values of reflectance in a wavelength range of 380nm-780 nm of a low reflection layer according to the 1st embodiment tothe 10th embodiment of the present disclosure.

FIG. 1-1 shows a surface diagram of crystalline grains according to the1st embodiment of the present disclosure.

FIG. 1-2 shows a surface diagram of crystalline grains according to the2nd embodiment of the present disclosure.

FIG. 1-3 shows a surface diagram of crystalline grains according to the3rd embodiment of the present disclosure.

FIG. 1-4 shows a surface diagram of crystalline grains according to the4th embodiment of the present disclosure.

FIG. 1-5 shows a surface diagram of crystalline grains according to the5th embodiment of the present disclosure.

FIG. 1-6 shows a surface diagram of crystalline grains according to the6th embodiment of the present disclosure.

FIG. 1-7 shows a surface diagram of crystalline grains according to the7th embodiment of the present disclosure.

FIG. 1-8 shows a surface diagram of crystalline grains according to the8th embodiment of the present disclosure.

FIG. 1-9 shows a surface diagram of crystalline grains according to the9th embodiment of the present disclosure.

FIG. 1-10 shows a surface diagram of crystalline grains according to the10th embodiment of the present disclosure.

FIG. 2 shows the values of reflectance in a wavelength range of 380nm-780 nm of a low reflection layer according to the 11th embodiment tothe 20th embodiment of the present disclosure.

FIG. 2-1 shows a surface diagram of crystalline grains according to the11th embodiment of the present disclosure.

FIG. 2-2 shows a surface diagram of crystalline grains according to the12th embodiment of the present disclosure.

FIG. 2-3 shows a surface diagram of crystalline grains according to the13th embodiment of the present disclosure.

FIG. 2-4 shows a surface diagram of crystalline grains according to the14th embodiment of the present disclosure.

FIG. 2-5 shows a surface diagram of crystalline grains according to the15th embodiment of the present disclosure.

FIG. 2-6 shows a surface diagram of crystalline grains according to the16th embodiment of the present disclosure.

FIG. 2-7 shows a surface diagram of crystalline grains according to the17th embodiment of the present disclosure.

FIG. 2-8 shows a surface diagram of crystalline grains according to the18th embodiment of the present disclosure.

FIG. 2-9 shows a surface diagram of crystalline grains according to the19th embodiment of the present disclosure.

FIG. 2-10 shows a surface diagram of crystalline grains according to the20th embodiment of the present disclosure.

FIG. 3 shows the values of reflectance in a wavelength range of 380nm-780 nm of a low reflection layer according to the 21st embodiment tothe 30th embodiment of the present disclosure.

FIG. 3-1 shows a surface diagram of crystalline grains according to the21st embodiment of the present disclosure.

FIG. 3-2 shows a surface diagram of crystalline grains according to the22nd embodiment of the present disclosure.

FIG. 3-3 shows a surface diagram of crystalline grains according to the23rd embodiment of the present disclosure.

FIG. 3-4 shows a surface diagram of crystalline grains according to the24th embodiment of the present disclosure.

FIG. 3-5 shows a surface diagram of crystalline grains according to the25th embodiment of the present disclosure.

FIG. 3-6 shows a surface diagram of crystalline grains according to the26th embodiment of the present disclosure.

FIG. 3-7 shows a surface diagram of crystalline grains according to the27th embodiment of the present disclosure.

FIG. 3-8 shows a surface diagram of crystalline grains according to the28th embodiment of the present disclosure.

FIG. 3-9 shows a surface diagram of crystalline grains according to the29th embodiment of the present disclosure.

FIG. 3-10 shows a surface diagram of crystalline grains according to the30th embodiment of the present disclosure.

FIG. 4 is a relationship diagram between the values of R3878 and anaverage diameter of the nanocrystalline grains according to the 1 stembodiment to the 30th embodiment of the present disclosure.

FIG. 5 is a relationship diagram between the values of R3850 and anaverage diameter of the nanocrystalline grains according to the 1stembodiment to the 30th embodiment of the present disclosure.

FIG. 6 is a relationship diagram between the values of R4070 and anaverage diameter of the nanocrystalline grains according to the 1stembodiment to the 30th embodiment of the present disclosure.

FIG. 7 is a relationship diagram between the values of R4055 and anaverage diameter of the nanocrystalline grains according to the 1stembodiment to the 30th embodiment of the present disclosure.

FIG. 8 is a relationship diagram between the values of R4565 and anaverage diameter of the nanocrystalline grains according to the 1stembodiment to the 30th embodiment of the present disclosure.

FIG. 9 is a relationship diagram between the values of R5058 and anaverage diameter of the nanocrystalline grains according to the 1stembodiment to the 30th embodiment of the present disclosure.

FIG. 10 is a relationship diagram between the values of R5570 and anaverage diameter of the nanocrystalline grains according to the 1stembodiment to the 30th embodiment of the present disclosure.

FIG. 11 is a relationship diagram between the values of R5878 and anaverage diameter of the nanocrystalline grains according to the 1stembodiment to the 30th embodiment of the present disclosure.

FIG. 12 is a cross-sectional view of a miniature optical lens assemblyaccording to the 31st embodiment of the present disclosure.

FIG. 13A is a schematic view of an electronic device according to the32nd embodiment of the present disclosure.

FIG. 13B is another schematic view of the electronic device of FIG. 13A.

FIG. 13C is a schematic view of elements of the electronic device ofFIG. 13A.

FIG. 13D is a block diagram of the electronic device of FIG. 13A.

FIG. 14 is a schematic view of an electronic device according to the33rd embodiment of the present disclosure.

FIG. 15 is a schematic view of an electronic device according to the34th embodiment of the present disclosure.

FIG. 16 is a schematic view of an electronic device according to the35th embodiment of the present disclosure.

DETAILED DESCRIPTION

The present disclosure provides a miniature optical lens assembly, whichhas at least one of optical element, including the optical element. Theoptical element includes a low reflection layer disposed on at least onesurface of the optical element. The low reflection layer includes aplurality of nanocrystalline grains, and the nanocrystalline grains arelocated on one surface of the low reflection layer. The optical elementis at least one of a light blocking element, an annular spacer elementand a barrel element. When an average diameter of the nanocrystallinegrains is DC, and a reflectance in a wavelength range of 380 nm-780 nmof the low reflection layer is R3878, the following conditions aresatisfied: 5 nm≤DC≤200 nm; and R3878≤0.50%.

In detail, a surface structure having the nanocrystalline grains of theminiature optical lens assembly of the present disclosure can beobtained by a crystallization process. The crystallization process isperformed through the arrangement that the low reflection layer isdisposed on the at least one surface of the optical element, and the atleast one surface of the low reflection layer is roughened and then anucleation reaction (such as physical vapor deposition, chemical vapordeposition, vacuum evaporation, sputtering, ion plating, etc.) isperformed thereon with appropriate materials. Because the surface of thelow reflection layer includes the nanocrystalline grains with properparticle sizes, the intensity of stray light being incident thereon canbe further destroyed and suppressed. Furthermore, a gradual distributionof the refractive index between the surface of the optical element andthe air can be achieved by the nanocrystalline grains made of materialwith a proper refractive index, so that the light can be incidentsmoothly but not be reflected. Thus, it is favorable for maintaining anultra-low reflectance of the surface of the optical element so as tosignificantly enhance the image quality of the miniature optical lensassembly of the present disclosure. Therefore, the miniature opticallens assembly of the present disclosure is suitable for applying on thesurface of the optical element of the lens assembly of mobile devices,so that it is favorable for significantly enhancing the optical imagequality and has cost advantages for a wide range of applications.

In the miniature optical lens assembly of the present disclosure, thelow reflection layer can be made of dark coating material having alight-absorbing ability. The dark coating material has a property ofbeing easily coated and adhered to the surface of elements, so that itis favorable for mass production, but the present disclosure is notlimited thereto.

In the miniature optical lens assembly of the present disclosure, thenanocrystalline grains can be made of oxide material, such as SiO₂,Al₂O₃, TiO₂, Ta₂O₅, TeO₂, ZnO, ZrO₂, GeO₂, MgO, etc. Furthermore, thenanocrystalline grains also can be made of metal nitride material, suchas AlN, SiN, Si₃N₄, etc. Furthermore, the nanocrystalline grains alsocan be made of metal fluoride material, such as MgF₂, CaF₂, etc.However, the present disclosure is not limited thereto. Furthermore,when a refractive index at a wavelength of 587.6 nm of thenanocrystalline grains is NC, the following condition can be satisfied:NC≤2.1. Furthermore, the following condition can be satisfied: NC≤1.9.Furthermore, the following condition can be satisfied: NC≤1.8.Furthermore, the following condition can be satisfied: NC≤1.7.Furthermore, the following condition can be satisfied: NC≤1.6.

In the miniature optical lens assembly of the present disclosure, thelight blocking element can be a dark thin sheet being ring-shaped andcan be disposed on an object side or an image side of an optical lenselement. Therefore, it is favorable for absorbing the stray light, butthe present disclosure is not limited thereto.

In the miniature optical lens assembly of the present disclosure, theannular spacer element can be disposed on the object side or the imageside of the optical lens element so as to provide a larger spacedistance between the optical lens elements. Therefore, it is favorablefor adjusting a proper space distance between the optical lens elementsand assembling the optical lens assembly stably.

In the miniature optical lens assembly of the present disclosure, thebarrel element can be a cylindrical shell for accommodating the opticallens elements, the light blocking element and the annular spacer elementand have a function to position and protect the elements disposedtherein, but the present disclosure is not limited thereto.

According to the miniature optical lens assembly of the presentdisclosure, when the average diameter of the nanocrystalline grains isDC, the following condition can be satisfied: 10 nm≤DC≤150 nm. In theminiature optical lens assembly of the present disclosure, a method tomeasure the average diameter of the nanocrystalline grains is observingthe surface thereof by an electron microscope. Then, the nanocrystallinegrains being granular or spherical are selected and a maximum diameterof a single grain is measured, and then at least five of thenanocrystalline grains within an area range of 1.2 μm² are selected soas to calculate the average diameter thereof. Therefore, the averagediameter of the nanocrystalline grains can be controlled appropriately,the nanocrystalline grains with large average diameter can enhance theheight drop of the surface, and the nanocrystalline grains with smallaverage diameter can achieve a better effect for suppressing the straylight. Furthermore, the following condition can be satisfied: 20nm≤DC≤150 nm. Furthermore, the following condition can be satisfied: 30nm≤DC≤125 nm. Furthermore, the following condition can be satisfied: 40nm≤DC≤100 nm. Furthermore, the following condition can be satisfied: 50nm≤DC≤75 nm. Furthermore, the following condition can be satisfied: 39nm≤DC≤88 nm.

According to the miniature optical lens assembly of the presentdisclosure, when the reflectance in a wavelength range of 380 nm-780 nmof the low reflection layer is R3878, the following condition can besatisfied: R3878≤0.30%. Therefore, it is favorable for absorbing a widerange of wavelengths of the stray light and maintaining the ultra-lowreflectance of the surface, so that the image quality can be enhanced.Furthermore, the following condition can be satisfied: R3878≤0.25%.Furthermore, the following condition can be satisfied: R3878≤0.20%.Furthermore, the following condition can be satisfied: R3878≤0.16%.Furthermore, the following condition can be satisfied: R3878≤0.14%.Furthermore, the following condition can be satisfied: R3878≤0.15%.

According to the miniature optical lens assembly of the presentdisclosure, when a reflectance in a wavelength range of 380 nm-500 nm ofthe low reflection layer is R3850, the following condition can besatisfied: R3850≤0.40%. Therefore, it is favorable for effectivelyabsorbing the stray light in the short wavelength range of the visiblelight, such as the stray light in a wavelength range of the blue visiblelight, so that a low reflectance of the surface in a particularwavelength range can be maintained. Furthermore, the following conditioncan be satisfied: R3850≤0.20%. Furthermore, the following condition canbe satisfied: R3850≤0.15%.

According to the miniature optical lens assembly of the presentdisclosure, when a reflectance in a wavelength range of 400 nm-700 nm ofthe low reflection layer is R4070, the following condition can besatisfied: R4070≤0.50%. Therefore, it is favorable for effectivelyabsorbing the stray light in the wavelength range of the visible lightso as to maintain the ultra-low reflectance of the surface. Furthermore,the following condition can be satisfied: R4070≤0.25%. Furthermore, thefollowing condition can be satisfied: R4070≤0.20%.

According to the miniature optical lens assembly of the presentdisclosure, when a reflectance in a wavelength range of 400 nm-550 nm ofthe low reflection layer is R4055, the following condition can besatisfied: R4055≤0.40%. Therefore, it is favorable for effectivelyabsorbing the stray light in the short wavelength range of the visiblelight, such as the stray light in a wavelength range of the blue visiblelight, so that a low reflectance of the surface in a particularwavelength range can be maintained. Furthermore, the following conditioncan be satisfied: R4055≤0.20%. Furthermore, the following condition canbe satisfied: R4055≤0.15%.

According to the miniature optical lens assembly of the presentdisclosure, when a reflectance in a wavelength range of 450 nm-650 nm ofthe low reflection layer is R4565, the following condition can besatisfied: R4565≤0.40%. Therefore, it is favorable for effectivelyabsorbing the stray light so that a low reflectance of the surface in aparticular wavelength range can be maintained. Furthermore, thefollowing condition can be satisfied: R4565≤0.20%. Furthermore, thefollowing condition can be satisfied: R4565≤0.15%.

According to the miniature optical lens assembly of the presentdisclosure, when a reflectance in a wavelength range of 500 nm-580 nm ofthe low reflection layer is R5058, the following condition can besatisfied: R5058≤0.50%. Therefore, it is favorable for effectivelyabsorbing the stray light in a particular wavelength range, such as thestray light in a wavelength range of the green visible light, so that alow reflectance of the surface in a wavelength range can be maintained.Furthermore, the following condition can be satisfied: R5058≤0.25%.Furthermore, the following condition can be satisfied: R5058≤0.20%.

According to the miniature optical lens assembly of the presentdisclosure, when a reflectance in a wavelength range of 550 nm-700 nm ofthe low reflection layer is R5570, the following condition can besatisfied: R5570≤0.30%. Therefore, it is favorable for effectivelyabsorbing the stray light in the long wavelength range of the visiblelight, such as the stray light in a wavelength range of the red visiblelight, so that a low reflectance of the surface in a particularwavelength range can be maintained. Furthermore, the following conditioncan be satisfied: R5570≤0.20%. Furthermore, the following condition canbe satisfied: R5570≤0.15%.

According to the miniature optical lens assembly of the presentdisclosure, when a reflectance in a wavelength range of 580 nm-780 nm ofthe low reflection layer is R5878, the following condition can besatisfied: R5878≤0.80%. Therefore, it is favorable for effectivelyabsorbing the stray light in the long wavelength range of the visiblelight, such as the stray light in a wavelength range of the red visiblelight and the near infrared light, so that a low reflectance of thesurface in a particular wavelength range can be maintained. Furthermore,the following condition can be satisfied: R5878≤0.40%. Furthermore, thefollowing condition can be satisfied: R5878≤0.20%.

According to the miniature optical lens assembly of the presentdisclosure, the nanocrystalline grains can be made of metal oxidematerial. Therefore, the reflectance thereof can be significantlyreduced, and the surface hardness and the wear resistance thereof can befurther enhanced by the particular material.

According to the miniature optical lens assembly of the presentdisclosure, the nanocrystalline grains can be made of SiO₂. Therefore,the surface refractive index can be changed so as to achieve a gradualdistribution of the refractive index between the surface of the opticalelement and the air, so that the reflectance of the surface can bereduced significantly.

According to the miniature optical lens assembly of the presentdisclosure, the nanocrystalline grains can be made of Al₂O₃. Therefore,the surface refractive index can be changed so as to achieve a gradualdistribution of the refractive index between the surface of the opticalelement and the air, so that the reflectance of the surface can bereduced significantly.

According to the miniature optical lens assembly of the presentdisclosure, the nanocrystalline grains can be made of TiO₂. Therefore,the reflectance of the surface can be reduced.

According to the miniature optical lens assembly of the presentdisclosure, the nanocrystalline grains can be made of the metal nitridematerial. Therefore, the reflectance of the surface can be reduced, andthe surface hardness and the wear resistance thereof can be furtherenhanced.

Each of the aforementioned features of the miniature optical lensassembly of the present disclosure can be utilized in variouscombinations for achieving the corresponding effects.

The present disclosure provides an imaging apparatus including theaforementioned miniature optical lens assembly and an image sensor. Theimage sensor is disposed on an image surface of the miniature opticallens assembly. More preferably, the imaging apparatus can furtherinclude a barrel member, a holder member, or a combination thereof.

The present disclosure provides an electronic device including theaforementioned imaging apparatus. Therefore, the image quality can beeffectively enhanced. More preferably, the electronic device can furtherinclude a control unit, a display, a storage unit, a random-accessmemory (RAM), or the combination thereof.

According to the above description of the present disclosure, thefollowing specific embodiments are provided for further explanation.

1st Embodiment to 10th Embodiment

Please refer to FIG. 1 to FIG. 1-10. FIG. 1 shows the values ofreflectance in a wavelength range of 380 nm-780 nm of a low reflectionlayer according to the 1st embodiment to the 10th embodiment of thepresent disclosure. FIG. 1-1 shows a surface diagram of crystallinegrains according to the 1st embodiment of the present disclosure. FIG.1-2 shows a surface diagram of crystalline grains according to the 2ndembodiment of the present disclosure. FIG. 1-3 shows a surface diagramof crystalline grains according to the 3rd embodiment of the presentdisclosure. FIG. 1-4 shows a surface diagram of crystalline grainsaccording to the 4th embodiment of the present disclosure. FIG. 1-5shows a surface diagram of crystalline grains according to the 5thembodiment of the present disclosure. FIG. 1-6 shows a surface diagramof crystalline grains according to the 6th embodiment of the presentdisclosure. FIG. 1-7 shows a surface diagram of crystalline grainsaccording to the 7th embodiment of the present disclosure. FIG. 1-8shows a surface diagram of crystalline grains according to the 8thembodiment of the present disclosure. FIG. 1-9 shows a surface diagramof crystalline grains according to the 9th embodiment of the presentdisclosure. FIG. 1-10 shows a surface diagram of crystalline grainsaccording to the 10th embodiment of the present disclosure.

In the nanocrystalline grains of the 1st embodiment to the 10thembodiment, the nanocrystalline grains are made of SiO₂. Furthermore, inFIG. 1-1 to FIG. 1-10, the size of the nanocrystalline grains is about0.95 μm in width and 1.27 μm in length, and the total area of FIG. 1-1to FIG. 1-10 is about 1.2 μm².

Please refer to Table 1 as follow.

TABLE 1 Nanocrystalline grains Em1 Em2 Em3 Em4 Em5 Em6 Em7 Em8 Em9 Em10SiO₂ DC (nm) 36 55 63 88 109 126 132 147 170 219 R3878 0.26 0.18 0.150.22 0.32 0.45 0.53 0.56 0.56 0.54 R3850 0.20 0.14 0.16 0.25 0.31 0.350.37 0.36 0.37 0.40 R4070 0.24 0.16 0.14 0.23 0.32 0.43 0.49 0.50 0.470.44 R4055 0.21 0.15 0.15 0.24 0.31 0.37 0.39 0.38 0.36 0.36 R4565 0.230.16 0.14 0.22 0.31 0.42 0.48 0.47 0.44 0.39 R5058 0.23 0.16 0.14 0.230.31 0.41 0.46 0.43 0.40 0.34 R5570 0.27 0.18 0.13 0.21 0.32 0.49 0.590.62 0.58 0.51 R5878 0.31 0.21 0.14 0.20 0.32 0.52 0.65 0.73 0.73 0.71

Table 1 shows the values of parameters of the optical element of theminiature optical lens assembly according to the 1st embodiment to the10th embodiment of the present disclosure, wherein “Em1” to “Em10”therein present the 1st embodiment to the 10th embodiment, respectively,DC is an average diameter of the nanocrystalline grains, R3878 is areflectance in a wavelength range of 380 nm-780 nm of the low reflectionlayer, R3850 is a reflectance in a wavelength range of 380 nm-500 nm ofthe low reflection layer, R4070 is a reflectance in a wavelength rangeof 400 nm-700 nm of the low reflection layer, R4055 is a reflectance ina wavelength range of 400 nm-550 nm of the low reflection layer, R4565is a reflectance in a wavelength range of 450 nm-650 nm of the lowreflection layer, R5058 is a reflectance in a wavelength range of 500nm-580 nm of the low reflection layer, R5570 is a reflectance in awavelength range of 550 nm-700 nm of the low reflection layer, and R5878is a reflectance in a wavelength range of 580 nm-780 nm of the lowreflection layer.

Please refer Table 2, Table 2 shows the values of the reflectance in awavelength range of 380 nm-780 nm of the low reflection layer accordingto the 1st embodiment to the 10th embodiment.

TABLE 2 Reflectance (%) Wavelength (nm) Em1 Em2 Em3 Em4 Em5 Em6 Em7 Em8Em9 Em10 380 0.18 0.13 0.18 0.26 0.31 0.31 0.40 0.40 0.45 0.51 385 0.200.14 0.17 0.27 0.31 0.34 0.38 0.37 0.43 0.49 390 0.18 0.14 0.19 0.270.33 0.35 0.37 0.37 0.41 0.48 395 0.20 0.13 0.18 0.27 0.33 0.35 0.400.39 0.43 0.48 400 0.20 0.15 0.18 0.27 0.33 0.35 0.37 0.38 0.40 0.46 4050.21 0.15 0.15 0.26 0.31 0.34 0.37 0.37 0.39 0.46 410 0.19 0.14 0.160.25 0.31 0.34 0.36 0.37 0.38 0.44 415 0.21 0.15 0.17 0.25 0.32 0.340.36 0.37 0.37 0.42 420 0.20 0.14 0.15 0.25 0.31 0.34 0.35 0.35 0.360.41 425 0.20 0.15 0.16 0.25 0.31 0.33 0.35 0.35 0.35 0.40 430 0.20 0.150.16 0.25 0.32 0.34 0.35 0.35 0.34 0.39 435 0.20 0.14 0.15 0.24 0.310.34 0.35 0.34 0.34 0.38 440 0.20 0.14 0.15 0.24 0.30 0.34 0.36 0.340.34 0.38 445 0.20 0.14 0.15 0.24 0.30 0.34 0.36 0.34 0.34 0.37 450 0.200.14 0.15 0.24 0.30 0.34 0.36 0.34 0.34 0.36 455 0.20 0.14 0.15 0.240.30 0.34 0.37 0.35 0.34 0.36 460 0.21 0.14 0.15 0.24 0.30 0.35 0.370.35 0.35 0.36 465 0.21 0.15 0.15 0.24 0.30 0.36 0.38 0.35 0.34 0.35 4700.20 0.14 0.15 0.23 0.30 0.35 0.38 0.36 0.35 0.35 475 0.20 0.14 0.150.23 0.30 0.36 0.38 0.36 0.35 0.34 480 0.21 0.15 0.15 0.24 0.31 0.360.39 0.36 0.35 0.35 485 0.21 0.15 0.15 0.23 0.31 0.37 0.39 0.36 0.350.34 490 0.21 0.15 0.15 0.24 0.30 0.37 0.40 0.37 0.35 0.34 495 0.21 0.150.14 0.23 0.30 0.37 0.40 0.37 0.35 0.33 500 0.21 0.15 0.15 0.23 0.310.38 0.41 0.38 0.36 0.33 505 0.21 0.16 0.14 0.23 0.31 0.38 0.41 0.380.36 0.33 510 0.21 0.15 0.14 0.23 0.31 0.38 0.42 0.39 0.37 0.33 515 0.210.15 0.14 0.23 0.31 0.39 0.42 0.40 0.37 0.33 520 0.22 0.16 0.14 0.230.31 0.39 0.43 0.40 0.38 0.33 525 0.22 0.16 0.14 0.23 0.31 0.40 0.440.41 0.38 0.33 530 0.22 0.16 0.14 0.23 0.31 0.41 0.45 0.42 0.39 0.33 5350.22 0.16 0.14 0.23 0.31 0.41 0.45 0.42 0.39 0.33 540 0.23 0.16 0.140.23 0.31 0.42 0.46 0.43 0.40 0.33 545 0.22 0.15 0.13 0.22 0.31 0.420.47 0.43 0.40 0.33 550 0.23 0.16 0.14 0.22 0.31 0.42 0.48 0.44 0.410.34 555 0.23 0.16 0.14 0.23 0.31 0.43 0.48 0.45 0.42 0.34 560 0.23 0.160.14 0.23 0.31 0.43 0.49 0.46 0.43 0.35 565 0.24 0.17 0.13 0.22 0.310.44 0.50 0.47 0.44 0.35 570 0.24 0.17 0.14 0.23 0.32 0.44 0.51 0.480.45 0.36 575 0.24 0.17 0.13 0.22 0.32 0.45 0.51 0.49 0.46 0.37 580 0.240.16 0.13 0.22 0.32 0.45 0.52 0.50 0.47 0.38 585 0.24 0.16 0.13 0.220.31 0.45 0.53 0.51 0.47 0.39 590 0.24 0.17 0.13 0.22 0.32 0.46 0.540.52 0.48 0.40 595 0.25 0.17 0.13 0.22 0.32 0.46 0.55 0.53 0.50 0.41 6000.25 0.17 0.13 0.22 0.32 0.46 0.55 0.55 0.51 0.41 605 0.25 0.17 0.130.22 0.32 0.47 0.56 0.56 0.51 0.42 610 0.25 0.17 0.13 0.22 0.32 0.480.57 0.57 0.53 0.44 615 0.25 0.17 0.13 0.21 0.32 0.48 0.58 0.58 0.550.45 620 0.26 0.18 0.13 0.22 0.32 0.49 0.59 0.60 0.56 0.47 625 0.27 0.180.13 0.21 0.33 0.49 0.60 0.61 0.57 0.48 630 0.27 0.18 0.13 0.21 0.330.49 0.61 0.63 0.59 0.50 635 0.27 0.18 0.13 0.21 0.33 0.50 0.62 0.640.61 0.52 640 0.28 0.18 0.13 0.21 0.33 0.50 0.62 0.65 0.62 0.53 645 0.280.18 0.13 0.21 0.33 0.50 0.63 0.67 0.63 0.55 650 0.29 0.19 0.14 0.210.33 0.51 0.63 0.68 0.65 0.57 655 0.29 0.19 0.14 0.21 0.33 0.51 0.640.69 0.66 0.59 660 0.29 0.19 0.13 0.21 0.32 0.51 0.65 0.71 0.68 0.61 6650.29 0.19 0.13 0.21 0.33 0.52 0.65 0.72 0.69 0.63 670 0.29 0.19 0.130.20 0.32 0.52 0.66 0.73 0.70 0.65 675 0.30 0.19 0.13 0.20 0.32 0.520.66 0.74 0.72 0.67 680 0.30 0.20 0.13 0.21 0.32 0.53 0.67 0.75 0.730.69 685 0.31 0.20 0.14 0.20 0.32 0.53 0.67 0.77 0.75 0.71 690 0.31 0.200.13 0.20 0.32 0.53 0.67 0.77 0.76 0.73 695 0.32 0.21 0.14 0.20 0.320.53 0.68 0.79 0.77 0.75 700 0.32 0.21 0.14 0.20 0.32 0.54 0.69 0.790.79 0.77 705 0.33 0.21 0.14 0.20 0.32 0.53 0.69 0.80 0.80 0.79 710 0.330.22 0.14 0.20 0.32 0.54 0.69 0.81 0.82 0.82 715 0.34 0.22 0.14 0.200.32 0.54 0.69 0.82 0.83 0.83 720 0.34 0.23 0.14 0.20 0.32 0.54 0.700.82 0.84 0.85 725 0.35 0.23 0.15 0.19 0.32 0.54 0.70 0.83 0.86 0.88 7300.35 0.24 0.15 0.20 0.32 0.55 0.71 0.85 0.88 0.91 735 0.36 0.24 0.160.20 0.32 0.55 0.72 0.86 0.89 0.93 740 0.36 0.25 0.16 0.19 0.32 0.550.71 0.86 0.90 0.95 745 0.37 0.25 0.16 0.20 0.32 0.55 0.72 0.87 0.920.97 750 0.38 0.26 0.16 0.20 0.31 0.55 0.72 0.88 0.93 0.99 755 0.38 0.260.16 0.19 0.32 0.55 0.72 0.89 0.95 1.01 760 0.39 0.27 0.17 0.19 0.310.56 0.73 0.89 0.96 1.03 765 0.39 0.27 0.17 0.19 0.31 0.55 0.72 0.900.97 1.05 770 0.41 0.27 0.17 0.19 0.31 0.55 0.73 0.91 0.99 1.07 775 0.410.27 0.17 0.19 0.30 0.55 0.73 0.91 1.00 1.08 780 0.42 0.28 0.18 0.190.31 0.56 0.73 0.92 1.02 1.10

The definitions of the aforementioned parameters in the followingembodiments are the same as that in Table 1 and Table 2 of the 1stembodiment, and are not repeated hereafter.

11th Embodiment to 20th Embodiment

Please refer to FIG. 2 to FIG. 2-10. FIG. 2 shows the values ofreflectance in a wavelength range of 380 nm-780 nm of a low reflectionlayer according to the 11th embodiment to the 20th embodiment of thepresent disclosure. FIG. 2-1 shows a surface diagram of crystallinegrains according to the 11th embodiment of the present disclosure. FIG.2-2 shows a surface diagram of crystalline grains according to the 12thembodiment of the present disclosure. FIG. 2-3 shows a surface diagramof crystalline grains according to the 13th embodiment of the presentdisclosure. FIG. 2-4 shows a surface diagram of crystalline grainsaccording to the 14th embodiment of the present disclosure. FIG. 2-5shows a surface diagram of crystalline grains according to the 15thembodiment of the present disclosure. FIG. 2-6 shows a surface diagramof crystalline grains according to the 16th embodiment of the presentdisclosure. FIG. 2-7 shows a surface diagram of crystalline grainsaccording to the 17th embodiment of the present disclosure. FIG. 2-8shows a surface diagram of crystalline grains according to the 18thembodiment of the present disclosure. FIG. 2-9 shows a surface diagramof crystalline grains according to the 19th embodiment of the presentdisclosure. FIG. 2-10 shows a surface diagram of crystalline grainsaccording to the 20th embodiment of the present disclosure.

In the nanocrystalline grains of the 11th embodiment to the 20thembodiment, the nanocrystalline grains are made of Al₂O₃. Furthermore,in FIG. 2-1 to FIG. 2-10, the size of the nanocrystalline grains isabout 0.95 μm in width and 1.27 μm in length, and the total area of FIG.2-1 to FIG. 2-10 is about 1.2 μm².

Please refer to Table 3 as follow.

TABLE 3 Nanocrystalline grains Em11 Em12 Em13 Em14 Em15 Em16 Em17 Em18Em19 Em20 Al₂O₃ DC (nm) 28 45 55 66 74 91 111 132 128 194 R3878 0.280.20 0.17 0.14 0.19 0.25 0.36 0.46 0.48 0.51 R3850 0.22 0.16 0.17 0.160.23 0.27 0.33 0.42 0.38 0.38 R4070 0.26 0.18 0.17 0.14 0.20 0.26 0.360.46 0.45 0.47 R4055 0.23 0.16 0.16 0.15 0.22 0.26 0.34 0.43 0.39 0.39R4565 0.25 0.18 0.16 0.14 0.19 0.25 0.36 0.46 0.44 0.45 R5058 0.24 0.170.16 0.14 0.20 0.25 0.36 0.45 0.43 0.43 R5570 0.29 0.20 0.17 0.13 0.170.25 0.38 0.49 0.51 0.55 R5878 0.34 0.23 0.19 0.14 0.16 0.24 0.38 0.480.55 0.63

Table 3 shows the values of parameters of DC, R3878, R3850, R4070,R4055, R4565, R5058, R5570 and R5878 of the optical element of theminiature optical lens assembly according to the 11th embodiment to the20th embodiment of the present disclosure, and “Em11” to “Em20” thereinpresent the 11th embodiment to the 20th embodiment, respectively.

Please refer Table 4, Table 4 shows the values of the reflectance in awavelength range of 380 nm-780 nm of the low reflection layer accordingto the 11th embodiment to the 20th embodiment.

TABLE 4 Reflectance (%) Wavelength (nm) Em11 Em12 Em13 Em14 Em15 Em16Em17 Em18 Em19 Em20 380 0.19 0.17 0.17 0.17 0.25 0.28 0.33 0.39 0.360.36 385 0.20 0.17 0.17 0.17 0.26 0.27 0.35 0.40 0.38 0.39 390 0.19 0.150.14 0.15 0.24 0.26 0.32 0.39 0.37 0.38 395 0.22 0.17 0.18 0.17 0.250.29 0.35 0.42 0.41 0.39 400 0.22 0.16 0.17 0.16 0.24 0.29 0.34 0.410.40 0.38 405 0.23 0.17 0.19 0.17 0.26 0.28 0.35 0.43 0.42 0.39 410 0.220.16 0.17 0.16 0.25 0.28 0.34 0.42 0.40 0.39 415 0.22 0.16 0.17 0.160.25 0.28 0.33 0.42 0.40 0.39 420 0.22 0.16 0.17 0.16 0.24 0.28 0.340.43 0.39 0.38 425 0.22 0.16 0.17 0.17 0.24 0.27 0.33 0.41 0.38 0.37 4300.22 0.16 0.17 0.16 0.24 0.27 0.33 0.42 0.38 0.37 435 0.21 0.16 0.170.15 0.23 0.27 0.33 0.42 0.38 0.37 440 0.22 0.16 0.17 0.15 0.23 0.270.33 0.42 0.37 0.37 445 0.22 0.16 0.16 0.15 0.23 0.27 0.32 0.42 0.370.37 450 0.22 0.16 0.16 0.15 0.23 0.26 0.33 0.42 0.37 0.37 455 0.22 0.160.16 0.15 0.23 0.26 0.33 0.42 0.38 0.38 460 0.22 0.16 0.16 0.15 0.220.26 0.33 0.42 0.38 0.37 465 0.22 0.16 0.16 0.15 0.22 0.26 0.33 0.420.38 0.38 470 0.22 0.16 0.16 0.15 0.22 0.26 0.33 0.42 0.38 0.37 475 0.230.16 0.16 0.15 0.22 0.26 0.33 0.42 0.38 0.37 480 0.23 0.16 0.16 0.150.22 0.26 0.33 0.42 0.38 0.38 485 0.23 0.16 0.16 0.15 0.22 0.25 0.330.43 0.38 0.38 490 0.23 0.16 0.16 0.15 0.21 0.25 0.33 0.43 0.38 0.38 4950.23 0.16 0.16 0.14 0.21 0.25 0.34 0.43 0.38 0.39 500 0.23 0.17 0.160.14 0.21 0.25 0.34 0.43 0.39 0.39 505 0.23 0.17 0.16 0.14 0.21 0.250.34 0.43 0.39 0.39 510 0.23 0.17 0.16 0.14 0.21 0.25 0.35 0.44 0.400.39 515 0.23 0.17 0.16 0.14 0.21 0.25 0.35 0.44 0.40 0.40 520 0.23 0.170.16 0.15 0.21 0.25 0.35 0.45 0.41 0.40 525 0.24 0.17 0.16 0.14 0.200.25 0.35 0.45 0.41 0.41 530 0.24 0.17 0.16 0.14 0.20 0.25 0.36 0.450.41 0.41 535 0.24 0.17 0.16 0.14 0.20 0.25 0.36 0.45 0.42 0.42 540 0.240.17 0.16 0.14 0.20 0.25 0.36 0.45 0.42 0.42 545 0.24 0.17 0.16 0.140.19 0.25 0.36 0.45 0.42 0.43 550 0.24 0.17 0.16 0.14 0.19 0.25 0.370.46 0.43 0.44 555 0.25 0.18 0.16 0.14 0.19 0.25 0.37 0.46 0.44 0.44 5600.25 0.18 0.16 0.14 0.19 0.25 0.37 0.47 0.45 0.45 565 0.25 0.18 0.160.14 0.19 0.25 0.37 0.47 0.45 0.46 570 0.25 0.18 0.16 0.14 0.19 0.250.37 0.47 0.46 0.47 575 0.26 0.18 0.16 0.14 0.19 0.25 0.38 0.47 0.470.47 580 0.26 0.18 0.16 0.14 0.19 0.25 0.38 0.48 0.47 0.48 585 0.26 0.180.16 0.14 0.18 0.25 0.38 0.48 0.48 0.48 590 0.26 0.18 0.16 0.14 0.180.25 0.38 0.48 0.49 0.49 595 0.26 0.18 0.16 0.13 0.18 0.25 0.38 0.480.49 0.50 600 0.27 0.19 0.16 0.13 0.18 0.25 0.38 0.48 0.49 0.50 605 0.270.19 0.16 0.13 0.17 0.25 0.38 0.48 0.49 0.51 610 0.27 0.19 0.16 0.130.17 0.26 0.38 0.49 0.50 0.52 615 0.27 0.19 0.16 0.13 0.17 0.25 0.380.49 0.51 0.53 620 0.28 0.19 0.16 0.13 0.17 0.26 0.38 0.49 0.51 0.54 6250.28 0.20 0.17 0.13 0.17 0.26 0.38 0.49 0.52 0.55 630 0.29 0.20 0.170.13 0.17 0.26 0.39 0.50 0.53 0.56 635 0.29 0.20 0.17 0.13 0.17 0.250.39 0.50 0.53 0.57 640 0.29 0.20 0.17 0.13 0.17 0.25 0.39 0.50 0.540.58 645 0.30 0.20 0.17 0.13 0.17 0.25 0.39 0.50 0.54 0.58 650 0.30 0.210.17 0.13 0.17 0.25 0.39 0.50 0.54 0.59 655 0.31 0.21 0.17 0.13 0.170.25 0.39 0.50 0.54 0.60 660 0.31 0.21 0.17 0.13 0.17 0.25 0.39 0.500.55 0.61 665 0.31 0.22 0.17 0.13 0.16 0.25 0.39 0.50 0.55 0.61 670 0.320.22 0.18 0.13 0.16 0.25 0.39 0.50 0.56 0.62 675 0.32 0.22 0.18 0.130.16 0.25 0.39 0.50 0.56 0.63 680 0.33 0.22 0.18 0.13 0.16 0.24 0.380.49 0.56 0.63 685 0.33 0.23 0.18 0.13 0.16 0.24 0.38 0.49 0.57 0.64 6900.33 0.23 0.18 0.13 0.16 0.24 0.38 0.49 0.56 0.65 695 0.34 0.23 0.180.13 0.15 0.24 0.38 0.49 0.57 0.66 700 0.34 0.24 0.18 0.13 0.16 0.240.38 0.49 0.57 0.66 705 0.36 0.25 0.19 0.14 0.16 0.24 0.38 0.49 0.580.67 710 0.36 0.25 0.19 0.13 0.15 0.24 0.38 0.48 0.58 0.68 715 0.36 0.250.19 0.14 0.16 0.24 0.38 0.48 0.58 0.68 720 0.37 0.26 0.19 0.14 0.160.23 0.38 0.47 0.58 0.69 725 0.37 0.26 0.20 0.14 0.16 0.24 0.38 0.470.58 0.70 730 0.39 0.27 0.20 0.14 0.16 0.24 0.39 0.47 0.59 0.71 735 0.390.27 0.20 0.14 0.16 0.23 0.38 0.47 0.59 0.71 740 0.40 0.28 0.21 0.150.16 0.23 0.38 0.47 0.59 0.72 745 0.40 0.28 0.21 0.15 0.16 0.23 0.380.47 0.59 0.72 750 0.41 0.29 0.21 0.15 0.16 0.23 0.38 0.47 0.59 0.73 7550.41 0.29 0.22 0.15 0.16 0.23 0.38 0.47 0.59 0.73 760 0.42 0.30 0.220.15 0.16 0.23 0.38 0.47 0.60 0.73 765 0.43 0.30 0.23 0.16 0.16 0.220.37 0.46 0.59 0.74 770 0.44 0.31 0.23 0.16 0.16 0.23 0.37 0.46 0.600.74 775 0.44 0.31 0.23 0.16 0.16 0.22 0.37 0.45 0.60 0.74 780 0.44 0.310.23 0.16 0.16 0.22 0.37 0.45 0.60 0.74

21 st Embodiment to 30th Embodiment

Please refer to FIG. 3 to FIG. 3-10. FIG. 3 shows the values ofreflectance in a wavelength range of 380 nm-780 nm of a low reflectionlayer according to the 21st embodiment to the 30th embodiment of thepresent disclosure. FIG. 3-1 shows a surface diagram of crystallinegrains according to the 21st embodiment of the present disclosure. FIG.3-2 shows a surface diagram of crystalline grains according to the 22ndembodiment of the present disclosure. FIG. 3-3 shows a surface diagramof crystalline grains according to the 23rd embodiment of the presentdisclosure. FIG. 3-4 shows a surface diagram of crystalline grainsaccording to the 24th embodiment of the present disclosure. FIG. 3-5shows a surface diagram of crystalline grains according to the 25thembodiment of the present disclosure. FIG. 3-6 shows a surface diagramof crystalline grains according to the 26th embodiment of the presentdisclosure. FIG. 3-7 shows a surface diagram of crystalline grainsaccording to the 27th embodiment of the present disclosure. FIG. 3-8shows a surface diagram of crystalline grains according to the 28thembodiment of the present disclosure. FIG. 3-9 shows a surface diagramof crystalline grains according to the 29th embodiment of the presentdisclosure. FIG. 3-10 shows a surface diagram of crystalline grainsaccording to the 30th embodiment of the present disclosure.

In the nanocrystalline grains of the 21st embodiment to the 30thembodiment, the nanocrystalline grains are made of TiO₂. Furthermore, inFIG. 3-1 to FIG. 3-10, the size of the nanocrystalline grains is about0.95 μm in width and 1.27 μm in length, and the total area of FIG. 3-1to FIG. 3-10 is about 1.2 μm².

Please refer to Table 5 as follow.

TABLE 5 Nanocrystalline grains Em21 Em22 Em23 Em24 Em25 Em26 Em27 Em28Em29 Em30 TiO₂ DC (nm) 25 31 39 55 63 73 92 115 146 189 R3878 0.28 0.270.26 0.30 0.29 0.44 0.61 0.87 1.08 1.19 R3850 0.24 0.25 0.26 0.30 0.380.57 0.64 0.77 1.14 1.43 R4070 0.26 0.25 0.24 0.28 0.29 0.46 0.63 0.820.97 1.19 R4055 0.24 0.24 0.24 0.28 0.33 0.53 0.64 0.72 1.02 1.31 R45650.25 0.24 0.23 0.27 0.28 0.46 0.64 0.77 0.89 1.16 R5058 0.24 0.23 0.230.27 0.28 0.47 0.64 0.73 0.85 1.19 R5570 0.28 0.26 0.25 0.28 0.24 0.390.63 0.91 0.92 1.06 R5878 0.32 0.29 0.28 0.32 0.24 0.35 0.58 0.99 1.121.05

Table 3 shows the values of parameters of DC, R3878, R3850, R4070,R4055, R4565, R5058, R5570 and R5878 of the optical element of theminiature optical lens assembly according to the 21st embodiment to the30th embodiment of the present disclosure, and “Em21” to “Em30” thereinpresent the 11th embodiment to the 20th embodiment, respectively.

Please refer Table 6, Table 6 shows the values of the reflectance in awavelength range of 380 nm-780 nm of the low reflection layer accordingto the 21st embodiment to the 30th embodiment.

TABLE 6 Reflectance (%) Wavelength (nm) Em21 Em22 Em23 Em24 Em25 Em26Em27 Em28 Em29 Em30 380 0.28 0.28 0.31 0.37 0.48 0.65 0.65 1.02 1.391.79 385 0.25 0.30 0.30 0.32 0.47 0.64 0.66 0.96 1.34 1.76 390 0.23 0.260.26 0.34 0.47 0.65 0.66 0.97 1.36 1.79 395 0.27 0.28 0.28 0.37 0.470.67 0.69 0.98 1.37 1.80 400 0.25 0.27 0.27 0.34 0.45 0.65 0.68 0.941.34 1.76 405 0.25 0.27 0.29 0.34 0.45 0.64 0.68 0.91 1.30 1.69 410 0.250.27 0.28 0.32 0.43 0.62 0.65 0.86 1.26 1.62 415 0.25 0.27 0.27 0.320.41 0.61 0.64 0.83 1.23 1.56 420 0.24 0.26 0.27 0.31 0.40 0.60 0.630.80 1.20 1.50 425 0.24 0.25 0.26 0.30 0.38 0.58 0.63 0.77 1.17 1.44 4300.24 0.25 0.25 0.29 0.37 0.57 0.63 0.75 1.15 1.41 435 0.24 0.25 0.250.29 0.36 0.57 0.62 0.72 1.13 1.37 440 0.23 0.25 0.25 0.29 0.36 0.560.62 0.71 1.12 1.34 445 0.24 0.24 0.24 0.28 0.35 0.55 0.62 0.70 1.101.32 450 0.23 0.24 0.24 0.28 0.34 0.55 0.62 0.68 1.08 1.29 455 0.24 0.240.24 0.28 0.34 0.54 0.63 0.68 1.07 1.28 460 0.23 0.24 0.24 0.28 0.330.54 0.62 0.67 1.04 1.26 465 0.23 0.24 0.24 0.27 0.33 0.53 0.63 0.661.02 1.24 470 0.23 0.24 0.24 0.28 0.33 0.53 0.62 0.66 1.01 1.23 475 0.230.24 0.24 0.27 0.32 0.53 0.62 0.66 0.99 1.23 480 0.23 0.23 0.24 0.270.32 0.53 0.63 0.66 0.98 1.23 485 0.23 0.23 0.24 0.27 0.31 0.52 0.630.66 0.97 1.22 490 0.23 0.23 0.23 0.27 0.31 0.51 0.62 0.66 0.95 1.21 4950.23 0.23 0.23 0.27 0.31 0.51 0.63 0.66 0.94 1.21 500 0.23 0.23 0.230.27 0.30 0.51 0.63 0.67 0.93 1.21 505 0.23 0.23 0.23 0.27 0.30 0.500.63 0.67 0.91 1.21 510 0.24 0.23 0.23 0.27 0.30 0.50 0.64 0.68 0.911.21 515 0.24 0.23 0.23 0.27 0.29 0.50 0.64 0.69 0.89 1.21 520 0.24 0.230.23 0.27 0.29 0.49 0.64 0.69 0.88 1.21 525 0.24 0.23 0.23 0.27 0.280.49 0.65 0.70 0.87 1.21 530 0.24 0.24 0.23 0.27 0.28 0.48 0.65 0.710.86 1.21 535 0.24 0.23 0.22 0.26 0.28 0.48 0.65 0.71 0.85 1.20 540 0.240.23 0.22 0.26 0.28 0.47 0.65 0.72 0.85 1.20 545 0.24 0.23 0.22 0.260.27 0.46 0.65 0.73 0.84 1.19 550 0.24 0.23 0.22 0.26 0.27 0.46 0.650.74 0.83 1.19 555 0.24 0.23 0.22 0.27 0.27 0.46 0.65 0.75 0.82 1.19 5600.25 0.24 0.23 0.27 0.27 0.45 0.65 0.77 0.82 1.18 565 0.25 0.24 0.230.27 0.27 0.45 0.65 0.78 0.82 1.17 570 0.25 0.24 0.23 0.27 0.26 0.440.65 0.79 0.81 1.17 575 0.25 0.24 0.23 0.27 0.26 0.44 0.65 0.80 0.811.16 580 0.25 0.24 0.23 0.27 0.26 0.43 0.65 0.82 0.81 1.15 585 0.25 0.240.23 0.27 0.25 0.43 0.64 0.83 0.81 1.13 590 0.26 0.25 0.23 0.27 0.250.42 0.65 0.84 0.81 1.12 595 0.26 0.25 0.23 0.27 0.25 0.42 0.64 0.850.82 1.11 600 0.26 0.25 0.23 0.27 0.25 0.41 0.64 0.86 0.82 1.10 605 0.260.25 0.23 0.27 0.24 0.41 0.64 0.87 0.82 1.08 610 0.27 0.25 0.23 0.270.24 0.40 0.64 0.88 0.83 1.07 615 0.27 0.26 0.23 0.28 0.24 0.40 0.640.90 0.84 1.07 620 0.27 0.26 0.24 0.28 0.24 0.40 0.64 0.91 0.86 1.06 6250.28 0.26 0.24 0.28 0.24 0.39 0.64 0.92 0.87 1.05 630 0.28 0.27 0.240.28 0.24 0.39 0.64 0.93 0.89 1.04 635 0.28 0.27 0.24 0.28 0.24 0.380.63 0.94 0.91 1.03 640 0.29 0.27 0.25 0.29 0.24 0.38 0.63 0.95 0.921.02 645 0.29 0.27 0.25 0.29 0.24 0.37 0.63 0.96 0.94 1.01 650 0.29 0.270.25 0.29 0.24 0.37 0.62 0.97 0.96 1.00 655 0.29 0.27 0.25 0.29 0.240.36 0.62 0.98 0.98 0.99 660 0.30 0.27 0.26 0.29 0.23 0.36 0.61 0.981.00 0.99 665 0.30 0.28 0.26 0.30 0.23 0.35 0.61 0.99 1.02 0.98 670 0.300.28 0.26 0.30 0.23 0.35 0.60 1.00 1.04 0.98 675 0.31 0.28 0.27 0.300.23 0.35 0.60 1.01 1.06 0.97 680 0.31 0.29 0.27 0.30 0.23 0.34 0.591.01 1.08 0.97 685 0.31 0.29 0.27 0.31 0.23 0.34 0.59 1.02 1.10 0.97 6900.31 0.29 0.28 0.31 0.23 0.33 0.58 1.03 1.12 0.97 695 0.32 0.30 0.280.31 0.23 0.33 0.57 1.03 1.15 0.97 700 0.32 0.30 0.28 0.32 0.23 0.320.57 1.04 1.17 0.97 705 0.33 0.30 0.29 0.32 0.23 0.32 0.56 1.04 1.200.98 710 0.33 0.30 0.29 0.33 0.24 0.32 0.56 1.05 1.22 0.98 715 0.34 0.310.30 0.33 0.24 0.31 0.55 1.04 1.25 0.99 720 0.34 0.31 0.30 0.33 0.240.31 0.54 1.04 1.27 0.99 725 0.35 0.32 0.30 0.34 0.24 0.31 0.54 1.051.30 1.01 730 0.35 0.32 0.31 0.35 0.25 0.31 0.54 1.06 1.33 1.03 735 0.360.33 0.31 0.36 0.25 0.30 0.53 1.06 1.36 1.04 740 0.37 0.33 0.32 0.360.25 0.30 0.53 1.06 1.39 1.06 745 0.37 0.33 0.32 0.37 0.25 0.30 0.521.07 1.41 1.07 750 0.38 0.34 0.33 0.37 0.26 0.30 0.52 1.07 1.44 1.09 7550.39 0.34 0.33 0.38 0.25 0.30 0.51 1.08 1.47 1.11 760 0.39 0.35 0.340.38 0.26 0.30 0.51 1.08 1.50 1.13 765 0.40 0.35 0.34 0.39 0.26 0.290.51 1.08 1.52 1.14 770 0.41 0.36 0.35 0.39 0.26 0.29 0.50 1.08 1.551.16 775 0.41 0.36 0.36 0.40 0.27 0.29 0.49 1.09 1.57 1.18 780 0.42 0.360.36 0.40 0.27 0.29 0.49 1.09 1.60 1.21

Please refer to FIG. 4 to FIG. 11. FIG. 4 is a relationship diagrambetween the values of R3878 and the average diameter of thenanocrystalline grains according to the 1st embodiment to the 30thembodiment of the present disclosure. FIG. 5 is a relationship diagrambetween the values of R3850 and the average diameter of thenanocrystalline grains according to the 1st embodiment to the 30thembodiment of the present disclosure. FIG. 6 is a relationship diagrambetween the values of R4070 and the average diameter of thenanocrystalline grains according to the 1st embodiment to the 30thembodiment of the present disclosure. FIG. 7 is a relationship diagrambetween the values of R4055 and the average diameter of thenanocrystalline grains according to the 1st embodiment to the 30thembodiment of the present disclosure. FIG. 8 is a relationship diagrambetween the values of R4565 and the average diameter of thenanocrystalline grains according to the 1st embodiment to the 30thembodiment of the present disclosure. FIG. 9 is a relationship diagrambetween the values of R5058 and the average diameter of thenanocrystalline grains according to the 1st embodiment to the 30thembodiment of the present disclosure. FIG. 10 is a relationship diagrambetween the values of R5570 and the average diameter of thenanocrystalline grains according to the 1st embodiment to the 30thembodiment of the present disclosure. FIG. 11 is a relationship diagrambetween the values of R5878 and the average diameter of thenanocrystalline grains according to the 1st embodiment to the 30thembodiment of the present disclosure.

FIG. 4 to FIG. 11 are respectively the relationship diagrams betweenR3878, R3850, R4070, R4055, R4565, R5058, R5570, R5878 and DC, whereinthe detail values of parameters of R3878, R3850, R4070, R4055, R4565,R5058, R5570, R5878 and DC according to the 1st embodiment to the 30thembodiment are shown in Table 1, Table 3 and Table 5 and are notrepeated hereafter. Furthermore, the reflectance described in thepresent disclosure is measured by the power ratio of the reflected waveto the incident wave based on the vertical (0 degree)incident/reflecting surface.

31st Embodiment

FIG. 12 is a cross-sectional view of a miniature optical lens assembly100 according to the 31st embodiment of the present disclosure. Theminiature optical lens assembly 100 includes at least one of opticalelement (reference number is omitted). The optical element includes alow reflection layer (reference number is omitted) disposed on at leastone surface of the optical element. The low reflection layer includes aplurality of nanocrystalline grains, and the nanocrystalline grains arelocated on a surface of the low reflection layer.

In detail, in the 31st embodiment, the miniature optical lens assembly100 includes three light blocking elements 110, two annular spacerelements 120 and a barrel element 130, the low reflection layer isdisposed on at least one surface of the light blocking elements 110, theannular spacer elements 120 and the barrel element 130, and thenanocrystalline grains of the low reflection layer can be thenanocrystalline grains of the 1st embodiment to the 30th embodimentaccording to actual needs. Therefore, the intensity of stray light beingincident on the low reflection layer can be further destroyed andsuppressed by the nanocrystalline grains with proper particle sizes.Furthermore, a gradual distribution of the refractive index between thesurface of the optical element and the air can be achieved by thenanocrystalline grains made of a material with a proper refractiveindex, so that it is favorable for maintaining the ultra-low reflectanceof the surface of the optical element and enhancing the optical imagequality of the miniature optical lens assembly 100.

32nd Embodiment

FIG. 13A is a schematic view of an electronic device 10 according to the32nd embodiment of the present disclosure. FIG. 13B is another schematicview of the electronic device 10 of FIG. 13A. FIG. 13C is a schematicview of elements of the electronic device 10 of FIG. 13A. FIG. 13D is ablock diagram of the electronic device 10 of FIG. 13A. As shown in FIG.13A, FIG. 13B, FIG. 13C and FIG. 13D, the electronic device 10 of the32nd embodiment is a smartphone, the electronic device 10 includes theimaging apparatus 11, wherein the imaging apparatus 11 includes aminiature optical lens assembly 12 of the present disclosure and animage sensor 13. The image sensor 13 is disposed on an image surface(not shown) of the miniature optical lens assembly 12. Therefore,marketing demands for mass production and outward appearance of theelectronic devices can be achieved.

Furthermore, the user can activate the capturing mode by a userinterface 19 of the electronic device 10, wherein the user interface 19of the 32nd embodiment can be a touch screen 19 a, a button 19 b, etc.At this moment, the miniature optical lens assembly 12 collects imaginglight on the image sensor 13 and outputs electronic signals associatedwith images to an image signal processor (ISP) 18.

Furthermore, in response to the camera specification of the electronicdevice 10, the electronic device 10 can further include an opticalanti-shake mechanism 14, which can be an optical image stabilization(OIS) device. Moreover, the electronic device 10 can further include atleast one auxiliary optical component (reference number is omitted) andat least one sensing component 16. The auxiliary optical component canbe a flash module 15 a and a focus auxiliary module 15 b, the flashmodule 15 a is for compensating the color temperature, and the focusauxiliary module 15 b can be an infrared distance measurement component,a laser focus module, etc. The sensing component 16 can have functionsfor sensing physical momentum and kinetic energies, such as anaccelerator, a gyroscope, and a hall effect element, so as to senseshaking or jitters applied by hands of the user or externalenvironments. Thus the autofocus function and the optical anti-shakemechanism 14 disposed on the electronic device 10 can function to obtaingreat image quality and facilitate the imaging apparatus 11 of theelectronic device 10 according to the present disclosure to have acapturing function with multiple modes, such as taking optimizedselfies, high dynamic range (HDR) with a low light source, 4K resolutionrecording, etc. Furthermore, the user can visually see the capturedimage of the camera through the touch screen 19 a and manually operatethe view finding range on the touch screen 19 a to achieve the autofocus function of what you see is what you get.

Furthermore, as shown in FIG. 13C, the imaging apparatus 11, the opticalanti-shake mechanism 14, the sensing component 16, the flash module 15 aand the focus auxiliary module 15 b can be disposed on a flexibleprinted circuit board (FPC) 17 a and electrically connected with theassociated elements, such as an image signal processor 18, via aconnector 17 b so as to perform a capturing process. Because the currentelectronic devices, such as smartphone, have a tendency of being lightand thin, the way of disposing imaging apparatus and related elements onthe flexible printed circuit board and then integrating the circuit intothe main board of the electronic device via the connector can satisfythe mechanical design of the limited space inside the electronic deviceand the layout requirements, and obtain more margins. The autofocusfunction of the imaging apparatus can be controlled more flexibly viathe touch screen of the electronic device. In other embodiments (notshown), the sensing components and the auxiliary optical components canalso be disposed on the main board of the electronic device or carrierboards in other forms according to requirements of the mechanical designand the circuit layout.

Moreover, the electronic device 10 can further include, but not belimited to, a display, a control unit, a storage unit, a random-accessmemory (RAM), a read-only memory (ROM), or the combination thereof.

33rd Embodiment

FIG. 14 is a schematic view of an electronic device 20 according to the33rd embodiment of the present disclosure. As shown in FIG. 14, theelectronic device 20 is a smartphone, the electronic device 20 includesthree imaging apparatus 21, wherein the imaging apparatus 21 includes aminiature optical lens assembly of the present disclosure (not shown)and an image sensor (not shown).

Furthermore, when the user captures images of an imaged object via auser interface (not shown) of the electronic device 20. At this moment,the miniature optical lens assembly collects imaging light on the imagesensor and outputs electronic signals associated with images to an imagesignal processor 28. Moreover, in response to the camera specificationof the electronic device 20, the electronic device 20 can furtherinclude an optical anti-shake mechanism 24, a flash module 25 a and afocus auxiliary module 25 b. Therefore, it is favorable for obtaining abetter image quality.

34th Embodiment

FIG. 15 is a schematic view of an electronic device 30 according to the34th embodiment of the present disclosure. The electronic device 30 ofthe 34th embodiment is a tablet, and the electronic device 30 includesan imaging apparatus 34 according to the present disclosure.

35th Embodiment

FIG. 16 is a schematic view of an electronic device 40 according to the35th embodiment of the present disclosure. The electronic device 40 ofthe 35th embodiment is a wearable device, and the electronic device 40includes an imaging apparatus 41 according to the present disclosure.

The foregoing description, for purpose of explanation, has beendescribed with reference to specific embodiments. It is to be noted thatTables show different data of the different embodiments; however, thedata of the different embodiments are obtained from experiments. Theembodiments were chosen and described in order to best explain theprinciples of the disclosure and its practical applications, to therebyenable others skilled in the art to best utilize the disclosure andvarious embodiments with various modifications as are suited to theparticular use contemplated. The embodiments depicted above and theappended drawings are exemplary and are not intended to be exhaustive orto limit the scope of the present disclosure to the precise formsdisclosed. Many modifications and variations are possible in view of theabove teachings.

What is claimed is:
 1. A miniature optical lens assembly, which has atleast one of optical element, comprising: the optical element,comprising: a low reflection layer disposed on at least one surface ofthe optical element, wherein the low reflection layer comprises: aplurality of nanocrystalline grains located on one surface of the lowreflection layer; wherein the optical element is at least one of a lightblocking element, an annular spacer element and a barrel element;wherein an average diameter of the nanocrystalline grains is DC, areflectance in a wavelength range of 380 nm-780 nm of the low reflectionlayer is R3878, and the following conditions are satisfied:5 nm≤DC≤200 nm; andR3878≤0.50%.
 2. The miniature optical lens assembly of claim 1, whereinthe average diameter of the nanocrystalline grains is DC, and thefollowing condition is satisfied:10 nm≤DC≤150 nm.
 3. The miniature optical lens assembly of claim 2,wherein the average diameter of the nanocrystalline grains is DC, andthe following condition is satisfied:39 nm≤DC≤88 nm.
 4. The miniature optical lens assembly of claim 1,wherein the reflectance in the wavelength range of 380 nm-780 nm of thelow reflection layer is R3878, and the following condition is satisfied:R3878≤0.30%.
 5. The miniature optical lens assembly of claim 4, whereinthe reflectance in the wavelength range of 380 nm-780 nm of the lowreflection layer is R3878, and the following condition is satisfied:R3878≤0.15%.
 6. The miniature optical lens assembly of claim 2, whereina reflectance in a wavelength range of 380 nm-500 nm of the lowreflection layer is R3850, and the following condition is satisfied:R3850≤0.40%.
 7. The miniature optical lens assembly of claim 2, whereina reflectance in a wavelength range of 400 nm-700 nm of the lowreflection layer is R4070, and the following condition is satisfied:R4070≤0.50%.
 8. The miniature optical lens assembly of claim 2, whereina reflectance in a wavelength range of 400 nm-550 nm of the lowreflection layer is R4055, and the following condition is satisfied:R4055≤0.40%.
 9. The miniature optical lens assembly of claim 2, whereina reflectance in a wavelength range of 450 nm-650 nm of the lowreflection layer is R4565, and the following condition is satisfied:R4565≤0.40%.
 10. The miniature optical lens assembly of claim 2, whereina reflectance in a wavelength range of 500 nm-580 nm of the lowreflection layer is R5058, and the following condition is satisfied:R5058≤0.50%.
 11. The miniature optical lens assembly of claim 2, whereina reflectance in a wavelength range of 550 nm-700 nm of the lowreflection layer is R5570, and the following condition is satisfied:R5570≤0.30%.
 12. The miniature optical lens assembly of claim 2, whereina reflectance in a wavelength range of 580 nm-780 nm of the lowreflection layer is R5878, and the following condition is satisfied:R5878≤0.80%.
 13. The miniature optical lens assembly of claim 2, whereinthe nanocrystalline grains are made of oxide material.
 14. The miniatureoptical lens assembly of claim 13, wherein the nanocrystalline grainsare made of silicon dioxide (SiO₂).
 15. The miniature optical lensassembly of claim 13, wherein the nanocrystalline grains are made ofaluminium oxide (Al₂O₃).
 16. The miniature optical lens assembly ofclaim 13, wherein the nanocrystalline grains are made of titaniumdioxide (TiO₂).
 17. The miniature optical lens assembly of claim 2,wherein the nanocrystalline grains are made of metal nitride material.18. An imaging apparatus, comprising: the miniature optical lensassembly of claim 1; and an image sensor disposed on an image surface ofthe miniature optical lens assembly.
 19. An electronic device,comprising: the imaging apparatus of claim 18.